Today I was driving down the road and we had a little shower/freezing drizzle in the Denver area -- and at the same time the sun was shining. It made for a beautiful rainbow.
Growing up in the south, we would say that if it rains and the sun shines at the same time, it will rain the same time again tomorrow.
There is no meteorological truth to that, and most likely that is said because you tend to get afternoon showers and thunderstorms during the warm season in the southeast states just about the same time each afternoon when a humid, hot airmass is in place.
But nonetheless, it is interesting.
Do you know any weather folklore? If so, share it with us.